Initially a Mixture of Two Radioactive Sources Contains the Same

question 31

Multiple Choice

Initially a mixture of two radioactive sources contains the same number of nuclei of source A and source B.The half-life of A is 2 hours,and the half-life of B is 3 hours.What will be the ratio of remaining nuclei of A divided by remaining nuclei B after 12 hours? (Assume A does not decay into B or vice-versa.)

• A)0.250
• B)0.125
• C)0.5
• D)0.0625
• E)None of these is correct.

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Definitions:

Tidal Volumes

The volume of air moved into or out of the lungs during a normal breath, critical in respiratory therapy and mechanical ventilation management.

Perfusion

The passage of blood or other fluids through the circulatory system to organs and tissues, providing essential nutrients and oxygen.

Alveolar Capillary Membrane

The thin layer of tissue in the lungs where gas exchange between air and blood takes place.

Gases Exchange

The biological process through which oxygen is taken into the body and carbon dioxide is expelled, primarily occurring in the lungs.